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Capillary Interactions between a Probe Tip and a Nanoparticle |
| SUN Li-Ning;WANG Le-Feng;RONG Wei-Bin |
| State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080 |
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| Cite this article: |
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SUN Li-Ning, WANG Le-Feng, RONG Wei-Bin 2008 Chin. Phys. Lett. 25 1795-1798 |
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Abstract To understand capillary interactions between probe tips and nanoparticles under ambient conditions, a theoretical model of capillary forces between them is developed based on the geometric relations. It is found that the contribution of surface tension force to the total capillary force attains to similar order of magnitude as the capillary pressure force in many cases. It is also shown that the tip shape and the radial distance of the meniscus have great influence on the capillary force. The capillary force decreases with the
increasing separation distances, and the variance of the contact angles may change the magnitudes of capillary forces several times at large radial distances. The applicability of the symmetric meniscus approximation is discussed.
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| Keywords:
68.03.Cd
68.08.-p
47.55.Dr
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Received: 20 February 2008
Published: 29 April 2008
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| PACS: |
68.03.Cd
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(Surface tension and related phenomena)
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68.08.-p
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(Liquid-solid interfaces)
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47.55.dr
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(Interactions with surfaces)
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